Specifically the number of engines simultaneously ignited. So not summing up over different stages. I am interested in the max for both number of engines and number of combustion chambers.
What I have found so far:
- Soyuz: 20 chambers (+12 vernier chambers) / 5 engines
- Energia: 20 chambers / 8 engines
- Falcon 9: 9 chambers / 9 engines
- N1: 30 chambers / 30 engines / No successful launches
- This: 44 engines / Sounding rocket; majority of engines were part of scientific payload; this is an upper bound though
Will the Falcon Heavy have more chambers / engines then any successful rocket to date? Does any other successful rocket have 9 or more engines? or has SpaceX already claimed that record?